Unit 5: Oceans and Atmosphere

In which atmospheric layer of Earth do thunderstorms occur?

• thermosphere
• mesosphere
• stratosphere
• troposphere

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Which gas makes up the largest component of the Earth’s atmosphere?

• argon (Ar)
• oxygen (O2)
• nitrogen (N2)
• carbon dioxide (CO2)

Why is the ozone content of the stratosphere important to living organisms?

• Ozone absorbs infrared radiation from the Sun.
• Ozone absorbs ultraviolet radiation from the Sun.
• Ozone is necessary to create oxygen for living things.
• Ozone in the atmosphere prevents radiation of heat from the Earth

Water in the ocean is always

• Moving

• Still

• Warming up

• Cooling down

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Currents that occur at or near the top layer of the ocean are called

• tidal currents

• convection currents

• deep currents

• surface currents

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Surface currents are mainly caused by

• the Coriolis Effect

• convection

• salinity

• temperature differences

• wind

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When a current bounces off a continent and changes direction, it's called

• the Coriolis Effect

• continental deflection

• continental redirection

• global winds

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The deflection of currents due to Earth's rotation is called the

• Rotation Effect

• Current Effect

• Upwelling Effect

• Deflection Effect

• Coriolis Effect

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The Coriolis Effect changes a current's path due to Earth's

• rotation

• winds

• tides

• temperature differences

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Warm water is _____ dense and _____ than cold water

• more; heavier

• more; lighter

• less; heavier

• less; lighter

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